Subnetting is a way to divide networks into more efficient smaller networks. Usually the reasons to subnet networks are security, better use of network address, and improve troubleshooting.
Here is a reference table of the commonly used TCP/IP classes and their subnet masks
Network Class
Beginning Octet
Default Subnet Mask
A
1-126
255.0.0.0
B
128-191
255.255.0.0
C
192-223
255.255.255.0
How to subnet in 5 steps:
Determine the class of your network
Convert the default subnet mask to binary
Determine how many bits you must borrow from the hosts portion of the default subnet mask
Use the following equation: 2n >= Number of subnet
Covert you custom subnet mask to decimal
Find the amount of hosts per network
Use the following equation: 2n-2 >= Number of hosts per subnet
Here you can find more information about subnetting. This is an example of a subnet network before and after.
Subnetting
Subnetting is a way to divide networks into more efficient smaller networks. Usually the reasons to subnet networks are security, better use of network address, and improve troubleshooting.
Here is a reference table of the commonly used TCP/IP classes and their subnet masks
B
128-191
255.255.0.0
C
192-223
255.255.255.0
How to subnet in 5 steps:
Here you can find more information about subnetting. This is an example of a subnet network before and after.